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BIOLOGY 1300 CHAPTERS 8, 9 & 10 DNA, RNA, PROTEIN SYNTHESIS MITOSIS, MEIOSIS, AND GENETICS.

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Presentation on theme: "BIOLOGY 1300 CHAPTERS 8, 9 & 10 DNA, RNA, PROTEIN SYNTHESIS MITOSIS, MEIOSIS, AND GENETICS."— Presentation transcript:

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2 BIOLOGY 1300 CHAPTERS 8, 9 & 10 DNA, RNA, PROTEIN SYNTHESIS MITOSIS, MEIOSIS, AND GENETICS

3 DNA and RNA DNA NUCLEOTIDES ADENINE THYMINE GUANINE CYTOSINE RNA NUCLEOTIDES ADENINE URACIL GUANINE CYTOSINE

4 A NUCEOTIDE CONTAINS: SUGAR—PENTOSE DNA—DEOXYRIBOSE RNA—RIBOSE PHOSPHATE NITROGENOUS BASE PURINES ADENINE, GUANINE PYRIMIDINES THYMINE, URACIL, CYTOSINE

5 THE CENTRAL DOGMA DNA-REPLICATES BY SEMICONSERVATIVE REPLICATION DNA-FORMS RNA BY TRANSCRIPTION RNA MAKES PROTEINS BY TRANSLATION [SEE PAGES 152-153]

6 DNA HELD IN PLACE: PROKARYOTIC CELLS HU PROTEINS EUKARYOTIC CELLS HISTONES WHICH WIND AROUND THE DNA TO FORM NUCLEOSOMES

7 DNA POLYMERASE ATTACHES THE NUCLEOTIDES TOGETHER DURING SEMICONSERVATIVE REPLICATION TO FORM THE NEW DNA STRANDS

8 CHROMOSOME TWISTED DNA HELD TOGETHER BY HISTONES TELOMERES ARE THE ENDS OF THE CHROMOSOME— AS THESE ARE LOST THE CELL AGES

9 DNA CODES INITIATOR OR START CODE— TAC ON DNA TERMINATOR OR STOP CODE ON DNA —ATT, ATC, OR ACT WHAT ARE THESE ON MRNA ? [CODONS]

10 GENES SECTIONS OF DNA WHICH CODE FOR CERTAIN PROTEINS, ETC. OF THE CELL USUALLY IN A CERTAIN POSITION ON THE CHROMOSOME TRANSPOSONS ARE ‘JUMPING GENES’ WHICH MOVE AROUND ON THE SAME CHROMOSOME OR TO OTHER CHROMOSOMES MUTATIONS ARE CHANGES IN GENES SEE PAGES 158-160 FOR THE DIFFERENT TYPES]

11 STAGES OF MITOSIS —Somatic cell division [One division--final cells have the 2n or diploid number of chromosomes INTERPHASE PROPHASE METAPHASE ANAPHASE TELOPHASE

12 MEIOSIS—REDUCTION DIVISION [Two divisions-- the final cells have the n or haploid number of chromosomes] OOGENESIS UNEQUAL DIVISION OF CYTOPLASM RESULTS IN 4 CELLS—1LARGE EGG AND 3 SMALL POLAR BODIES [Only the egg is capable of being fertilized] SPERMATOGENESIS HAS EQUAL DIVISION OF THE CYTOPLASM RESULTING IN 4 CELLS OF EQUAL SIZE


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